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Question

II在SQL兩個表

1.inventtable(itemnumber) 
2.etext(itemnumber,Rkey,Rval,Lang,id,text) 

我想從inventtable其中THW itemnumber相同ETEXT表和ETEXT表itemnumber包含RKEY = 1，RVAL選擇Itemnumber = 1，id = 2）。如何實現這個？

Answer 1

試試這個：

select i.itemnumber 
from inventtable i 
join etext e on i.itemnumber = e.itemnumber 
where e.Rkey = 1 and e.rval =1 and e.id =2 

Answer 2

select i.itemnumber 
from inventtable i inner join etext e  
on i.itemnumber = e.itemnumber 
where e.Rkey = 1 
and e.rval =1 
and e.id =2 

Answer 3

Select itemnumber From inventtable 
Where inventtable in (Select itemnumber From etext Where Rkey=1 AND rval=1 AND id=2)